Adams-Mason House - View this location on map Federal style frame house built c. 1810-12 by Thomas Adams; one of few remaining clapboard houses in the Georgetown waterfront area; purchased by carriage maker George W. Mason c. 1880, occupied by Mason family until 1964; 2-1/2 stories with gable roof and dormers, separate dwelling and shop doors 1072 Thomas Jefferson Street, Washington , DC Historical

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